Mixed Integer Linear Programming (MILP) solver lp_solve solves pure linear, (mixed) integer/binary, semi-cont and special ordered sets (SOS) models.lp_solve is written in ANSI C and can be compiled on many different platforms like Linux and WINDOWS
This project is moved to github: https://lp-solve.github.io/
Java ILP is a simple java interface to (mixed) integer linear programming solvers such as lp_solve, Glpk, Gurobi, SAT4J (0-1 ILP), MiniSat+(0-1 ILP), CPLEX, or Mosek. (documentation at http://javailp.sourceforge.net/)
PSyCoMa is a utility for managing scientific conferences. It supports paper submission, bidding, automatic reviewer assignment (using ILP), and discussion forums. It requires PHP 4.x (at least 4.3), PostgreSQL 7.x and lp_solve 5.5.